Sneak

The sneak skill will enable you to pick pockets and move around unnoticed by observers. Moving around in sneak mode without being discovered or successfully picking a pocket will help you to level this skill up.

You can easily increase this skill by sneaking around a sleeping NPC.

Mastery Level

Bonuses

Novice

4x damage bonus for one-handed weapons and hand-to-hand and a 2x damage bonus for marksman attacks when undetected

Apprentice

6x damage bonus for one-handed weapons and hand-to-hand and a 3x damage bonus for marksman attacks when undetected

Journeyman

The weight of your boots gives no penalty towards the chance of being detected